Dan Gohman
5e58ab0b56
LLVM instruction syntax doesn't have trailing semicolons.
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llvm-svn: 97456
2010-03-01 17:53:15 +00:00
Evan Cheng
d9816ef946
Instcombine constant folding can normalize gep with negative index to index with large offset. When instcombine objsize checking transformation sees these geps where the offset seemingly point out of bound, it should just return "i don't know" rather than asserting.
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llvm-svn: 96825
2010-02-22 23:34:00 +00:00
Eric Christopher
96f3c4222f
Fix a problem where we had bitcasted operands that gave us
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odd offsets since the bitcasted pointer size and the offset pointer
size are going to be different types for the GEP vs base object.
llvm-svn: 96134
2010-02-13 23:38:01 +00:00
Eric Christopher
2e0201ee18
Make sure that ConstantExpr offsets also aren't off of extern
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symbols.
Thanks to Duncan Sands for the testcase!
llvm-svn: 95877
2010-02-11 17:44:04 +00:00
Eric Christopher
9516309f55
Add ConstantExpr handling to Intrinsic::objectsize lowering.
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Update testcase accordingly now that we can optimize another
section.
llvm-svn: 95846
2010-02-11 01:48:54 +00:00
Eric Christopher
6691a59247
Move Intrinsic::objectsize lowering back to InstCombineCalls and
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enable constant 0 offset lowering.
llvm-svn: 95691
2010-02-09 21:24:27 +00:00
Eric Christopher
871cf7bce2
Pull these back out, they're a little too aggressive and time
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consuming for a simple optimization.
llvm-svn: 95671
2010-02-09 17:29:18 +00:00
Eric Christopher
428b385575
Add a new pass to do llvm.objsize lowering using SCEV.
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Initial skeleton and SCEVUnknown lowering implemented,
the rest should come relatively quickly. Move testcase
to new directory.
Move pass to right before SimplifyLibCalls - which is
moved down a bit so we can take advantage of a few opts.
llvm-svn: 95628
2010-02-09 00:35:38 +00:00
Eric Christopher
f89979ce6a
Remove this code for now. I have a better idea and will rewrite with
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that in mind.
llvm-svn: 95402
2010-02-05 19:04:06 +00:00
Eric Christopher
ee4a176739
Temporarily revert this since it appears to have caused a build
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failure.
llvm-svn: 95294
2010-02-04 06:41:27 +00:00
Eric Christopher
9b3e42f09e
Rework constant expr and array handling for objectsize instcombining.
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Fix bugs where we would compute out of bounds as in bounds, and where
we couldn't know that the linker could override the size of an array.
Add a few new testcases, change existing testcase to use a private
global array instead of extern.
llvm-svn: 95283
2010-02-04 02:55:34 +00:00
Eric Christopher
fe6ab1518e
If we're dealing with a zero-length array, don't lower to any
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particular size, we just don't know what the length is yet.
llvm-svn: 95266
2010-02-03 23:56:07 +00:00
Eric Christopher
ac28e14b77
Recommit this, looks like it wasn't the cause.
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llvm-svn: 95165
2010-02-03 00:21:58 +00:00
Eric Christopher
f070aae6f7
Hopefully temporarily revert this.
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llvm-svn: 95154
2010-02-02 23:01:31 +00:00
Eric Christopher
575fe8690d
Re-add strcmp and known size object size checking optimization.
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Passed bootstrap and nightly test run here.
llvm-svn: 95145
2010-02-02 22:10:43 +00:00
Eric Christopher
47d90f7adb
Revert my last couple of patches. They appear to have broken bison.
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llvm-svn: 94841
2010-01-29 21:16:24 +00:00
Eric Christopher
7d74af1824
Add constant support to object size handling and remove default
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lowering. We'll either figure it out, or not and be lowered by
SelectionDAGBuild.
Add test.
llvm-svn: 94775
2010-01-29 01:09:57 +00:00
